Show HN: I replaced a $120k bowling center system with $1,600 in ESP32s
Summary
A personal project where the author replaces an expensive bowling-center score system with a low-cost ESP32-based open hardware stack. It describes the hardware setup (ESP32 nodes, RS485 fallback, Redis, Raspberry Pi), mesh networking (ESPNow), and the motivation to avoid vendor lock-in; plans to open-source the hardware and software.